A Study of Extraction of Granatum Dye and its Direct Dyeing for Silk Fabric

Granatum dye was extracted using water decoction method and its direct dyeing for silk fabric was also studied in this research. Then the rubbing fastness and soaping fastness of dyed fabric was measured. By analyzing experimental data, it was found that the optimal extraction concentration of granatum dye was 6 g/100 ml and the best dyeing conditions of direct dyeing with granatum dye was dyeing solution concentration X, pH value 4, temperature 70 degrees C, NaCl concentration 5 g/L. The rubbing fastness and soaping fastness of dyed silk fabric both reached to more than 4.5 grades, and the color fastness was good. Therefore, granatum dye can be regarded as environmental dye and applied to fabric dyeing.